1/*	$NetBSD: kvm_vax.c,v 1.17 2010/09/19 02:07:00 jym Exp $ */
2
3/*-
4 * Copyright (c) 1992, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * This code is derived from software developed by the Computer Systems
8 * Engineering group at Lawrence Berkeley Laboratory under DARPA contract
9 * BG 91-66 and contributed to Berkeley.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in the
18 *    documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its contributors
20 *    may be used to endorse or promote products derived from this software
21 *    without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36/*
37 * VAX machine dependent routines for kvm.  Hopefully, the forthcoming
38 * vm code will one day obsolete this module.  Furthermore, I hope it
39 * gets here soon, because this basically is an error stub! (sorry)
40 * This code may not work anyway.
41 */
42
43#include <sys/param.h>
44#include <sys/user.h>
45#include <sys/proc.h>
46#include <sys/stat.h>
47#include <sys/types.h>
48
49#include <unistd.h>
50#include <nlist.h>
51#include <stdlib.h>
52#include <kvm.h>
53
54#include <uvm/uvm_extern.h>
55
56#include <machine/vmparam.h>
57
58#include <limits.h>
59#include <db.h>
60
61#include "kvm_private.h"
62
63
64struct vmstate {
65	u_long end;
66};
67
68void
69_kvm_freevtop(kvm_t *kd)
70{
71	if (kd->vmst != 0)
72		free(kd->vmst);
73}
74
75int
76_kvm_initvtop(kvm_t *kd)
77{
78	struct vmstate *vm;
79	struct stat st;
80	struct nlist nl[2];
81
82	vm = (struct vmstate *)_kvm_malloc(kd, sizeof(*vm));
83	if (vm == 0)
84		return (-1);
85
86	kd->vmst = vm;
87
88	if (fstat(kd->pmfd, &st) < 0)
89		return (-1);
90
91	/* Get end of kernel address */
92	nl[0].n_name = "_end";
93	nl[1].n_name = 0;
94	if (kvm_nlist(kd, nl) != 0) {
95		_kvm_err(kd, kd->program, "pmap_stod: no such symbol");
96		return (-1);
97	}
98	vm->end = (u_long)nl[0].n_value;
99
100	return (0);
101}
102
103#define VA_OFF(va) (va & (NBPG - 1))
104
105/*
106 * Translate a kernel virtual address to a physical address using the
107 * mapping information in kd->vm.  Returns the result in pa, and returns
108 * the number of bytes that are contiguously available from this
109 * physical address.  This routine is used only for crash dumps.
110 */
111int
112_kvm_kvatop(kvm_t *kd, vaddr_t va, paddr_t *pa)
113{
114	u_long end;
115
116	if (va < (u_long) KERNBASE) {
117		_kvm_err(kd, 0, "invalid address (%#"PRIxVADDR"<%lx)", va,
118		    (u_long)KERNBASE);
119		return (0);
120	}
121
122	end = kd->vmst->end;
123	if (va >= end) {
124		_kvm_err(kd, 0, "invalid address (%#"PRIxVADDR"<%lx)", va,
125		    end);
126		return (0);
127	}
128
129	*pa = (va - (u_long) KERNBASE);
130	return (end - va);
131}
132
133/*
134 * Translate a physical address to a file-offset in the crash dump.
135 * XXX - crash dump doesn't work anyway.
136 */
137off_t
138_kvm_pa2off(kvm_t *kd, paddr_t pa)
139{
140	return(kd->dump_off + pa);
141}
142
143
144/*
145 * Machine-dependent initialization for ALL open kvm descriptors,
146 * not just those for a kernel crash dump.  Some architectures
147 * have to deal with these NOT being constants!  (i.e. m68k)
148 */
149int
150_kvm_mdopen(kvm_t *kd)
151{
152
153	kd->usrstack = USRSTACK;
154	kd->min_uva = VM_MIN_ADDRESS;
155	kd->max_uva = VM_MAXUSER_ADDRESS;
156
157	return (0);
158}
159